Leakproof container for fluids



' Oct. 25, 1938. A. J. KRAMER 2,134,052

LEAKPROOF CONTAINER FOR FLUIDS Filed July 1, 1936 INVENTOR BY Q a! a ATTO NEY n,

Patented Oct. 25, 1938 ZUNITED, STATES PATENT. OFFICE- 2 Claims.

This invention relates to folding paper boxes. It is an object of the invention to provide a paper container, of the type commonly used for ice cream, or products of a like nature, with a closure member which renders the, container Another object of the invention is to provide a container of the class described with a closure, supplementing the closure for rendering the container fluid-tight, which afiords protection of the second closure against puncture or displacement. v

Still another object of the invention is to provide an integral portion of the container which functions simultaneously to provide a lock for shutting the closure and a handle by means of which the container may be carried.

The invention possesses other objects and valuable features, some of which, together with the foregoing, will be specifically set forth in the detailed description of the invention hereunto annexed. It is to be understood that the invention is not to be limited to the particular species thereof shown and described herein, as various other embodiments thereof may be employed within the scope of the appended claims.

The broad aspects of the invention may be ascertained by reference to the accompanying drawing, in which:

Figure l is a front elevational view of a container embodying the principles of the invention. A portion of the view is broken away to more clearly disclose the construction.

Figure-2 is a side elevational view of the structure shown in Figure 1.

Figure 3 is a front elevational view of the container showing the outer closure shut.

Figure 4 is a top plan view of the unfolded inner closure member. I

Figure 5 is a top plan view of the blank from which the container is formed.

It is contemplated to provide a container composed of light fiberboard in which liquids, or other products containing liquids may be safely packed, and which will, due to the very low cost of manufacture, replace costly glass or sheet metal containers now in common use for packaging goods of this character. It is further contemplated, by providing a container, upon which advertising matter may be directly printed, to dispense with the expensive labels used on the glass or sheet metal containers mentioned above.

In detail, and referring particularly to Figure 5, of the drawing, the container is formed from a blank having a rectangular center portion 6 defined by longitudinal andtransverse scores I and 8 respectively. Extending from the transverse edges of'the center portionv are end wall portions 9 having diverging edges I0, and provided with a transverse score ll beyond which extends a 'cover flap I2. 7

Extending from one longitudinal edge of the center portion is a side wall portion l3 borderedby diverging scores HI and a transverse score l5, and extending beyond the latter score is a cover flap l6 provided with a slot IT. The opposite longitudinal edge of the center portion is pro vided with a side wall portion I8 extending there-' from, this portion being provided, like the side wall portion I 3, with diverging scores l9 and a transverse score 20; and extending beyond the score 20 is a cover flap 2| provided on its outer edge with a tabular projection 22, having therein an aperture 23, and provided at the junction thereof with the flap portions 2|, with a notch 24. Both of the side wall portions I3 and I8, along the scores, and I 9 respectively thereof, are provided with wing-like extensions 25, these extensions being separated from the side wall portions 9 by slits 26. I

The container is set up by folding the side wall portions 9 upwardly along the scores 8 to sub stantially vertical position, similarly bending the side wall portions l3 and I8 upwardly to contact the side edges ID of the portions 9, and bending the wing-like extensions 25 to positions overlying the outer surfaces of the portions 9, as is shown in Figure 2. The contacting portions of the members 9 and the abutting members 25 are now adhesively secured together, sufficient of the adhesive being applied so that all of the joints, particularly the bottom-corners 21 of the container, are leak-proof. Closing of the container may be effected, as is shown in Figure 3, by bending the two cover flaps l2 inwardly and downwardly into overlapping relationship, similarly bending the cover flaps l6 and 2| into overlapping relationship overlying the flaps l2, and engaging the tabular projection 22 with theslot ll. It will be noted that the position of the slotis ofiset with respect to the center of the flap [6 and the extension 22 so that, when the extension is engaged in the slot, the notch 24 of the extension will overlie the surface of the flap,

at one end of the slot, and lock the flaps together against easy or accidental separation. It will also be noted in Figure 3, that by bending the extension 22, along the dotted line 28, to a position at right-angles to the flap, the extension affords a handle by means of which the container may be carried, the aperture 23 being provided for the reception of a finger of the carrier's hand, insuring a firm grip.

Means is provided for hermetically sealing the container to render it leak-proof when the former is used in packaging fluids or other goods containing fluids. In Figure 4 is shown a closure member comprising a central portion .29, defined by longitudinal and transverse scores 30, and extending from each edge of the central portion is a marginal flange 3|. This closure is formed by bending each of the flanges 3| to positions lying substantially at right-angles to one surface of the center portion 29, and the closure, after the container has been filled with the material to be packed therein, is inserted in the container, as

shown in Figure 1, a suitable adhesive being first applied to the outer surface of each of the flanges so that the closure is sealed to the side and end walls of the container. .for use only in the packaging. of fluids or other products which will spoil by being exposed to the air for extended periods, and the function of the cover flaps of the container proper, when the second closure is used, is in addition to providing the the fiberboard may, either before or after the container is assembled, be coated or impregnated with paraffin, if the contents is oil or oleaginous I'his closure is intended material, the coating or impregnating material may be shellac or a mixture of gelatine and glycerine, or it may also be a mixture of carbon disulphide, linseed oil and caoutchouc. For certain products a casein solution may also be used.

It will, of course, be understood that the container above described is to be constructed in sizes capable of holding standard measures, and that for the larger sizes of containers it is necessary to increase the thickness of the fiberboard used so as to provide for a maximum of rigidity, and resistance to collapse or crushing.

I. claim:

1. In combination, a container comprising a single sheet of material folded to provide a box having a bottom, side walls, an open end, and flaps extending'from said side walls and bordering said open end, a closure member for the open end of said box comprising a sheet of material provided with marginal flanges. adhesively secured to said side walls, and said flaps being foldable to positions overlying said closure member.

2. In combination, a container comprising a single sheet of material folded to provide a. box having a bottom, side walls, an openend, and flaps extending from said side walls and bordering said open end, a closure member for the open end of said box comprising a sheetfof material provided with marginal flanges adhesively secured to said side walls, said flaps being foldable to positions overlying said closure member, one of said flaps having a slot therein, and another of said. flaps having anextension thereof engaging in' said slot and projecting from said container to provide a carrying handle therefor.

' ALPHONSE J. KRAMER. 

